here is a list of the Android Roms for the LG GT540 aka Optimus
Found By hecatae From http://android.modaco.com/
Updates found so far 04/11/10
Carphone Warehouse (CPW) UK Open 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AGBWBK/V20b_00/V20B_00.kdz
Tesco Mobile UK 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ATSCBK/V20b_00/V20B_00.kdz
Polish 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/APOLTS/V20a_00/V20A_00.kdz
Europe Open 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ANEUBK/V20a_00/V20A_00.kdz
Romania 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AROMBK/V20a_00/V20A_00.kdz
AUSTRALIA (HUTCHISON) 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540F/AHHSBK/V20b_00/V20B_00.kdz
AUSTRALIA (VODAFONE) 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AVDABK/V20b_00/V20B_00.kdz
India 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AINDBK/V20b_00/V20B_00.kdz
Singapore (StarHub) 2.1 http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ASHBBK/V20b_00/V20B_00.kdz
Android 2.1 Vodafone UK V20B http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AVDFTS/V20b_00/V20B_00.kdz
Android 2.1 Greece V20A http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AGRCBK/V20a_00/V20A_00.kdz
Android 2.1 France V20A http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABYTBK/V20a_00/V20A_00.kdz
Android 2.1 CIS V20B http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ACISWP/V20B_00/V20B_00.kdz
Android 2.1 France Bouygues V20A http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABYTBK/V20a_00/V20A_00.kdz
Android 2.1 Baltic Black V20B http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABALBK/V20B_00/V20B_00.kdz
Android 2.1 Vodafone Greece Cyprus V20A http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AVDXBK/V20a_00/V20A_00.kdz
Android 2.1 Taiwan V20A http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ATWNBK/V20a_00/V20A_00.kdz
Android 2.1 Hong Kong V20A http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AHKGBK/V20a_00/V20A_00.kdz
V10A CPW UK Open http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AGBWBK/V10a_00/V10A_00.kdz
V10A O2 UK http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540GO/AO2UBK/V10a_00/V10A_00.kdz
V10A O2 Ireland http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AO2ITS/V10a_00/V10A_00.kdz
V10A Australia http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AAUSBK/V10a_00/V10A_00.kdz
V10A ERA POL http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AERABK/V10a_00/V10A_00.kdz
V10A Australia Vodafone http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AVDABK/V10a_00/V10A_00.kdz
V10A Australia Hutchison http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540f/AHHSBK/V10a_00/V10A_00.kdz
V10B Belgian http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABEGTS/V10b_00/V10B_00.kdz
V10B Taiwan http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ATWNBK/V10b_00/V10B_00.kdz
V10B Hong Kong http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AHKGBK/V10b_00/V10B_00.kdz
V10B TMN Portugal http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ATMPBK/V10b_00/V10B_00.kdz
V10C O2 UK http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AO2UBK/V10c_00/V10C_00.kdz
V10C Balkan http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABTVBK/V10c_00/V10C_00.kdz
V10C Polish http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/APOLTS/V10c_00/V10C_00.kdz
V10C Europe Open http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ANEUBK/v10c_00/V10C_00.kdz
V10C Singapore Sea http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ASEAWA/V10c_00/V10C_00.kdz
V10C Hong Kong http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AHKGBK/V10c_00/V10C_00.kdz
V10D Orange UK http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/AORUTS/V10d_00/V10D_00.kdz
V10D German http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ADEUAP/V10d_00/V10D_00.kdz
V10E German http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ADEUAP/V10e_00/V10E_00.kdz
V10D Baltic http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABALBK/V10d_00/V10D_00.kdz
V10D Poland http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/APOLTS/V10d_00/V10D_00.kdz
V10E Baltic http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ABALBK/V10e_00/V10E_00.kdz
V10F Croatia http://csmg.lgmobile.com:9002/swdata/WEBSW/GT540/ATLKBK/V10f_00/V10F_00.kdz
