So, you want to get rid of operator's branding. In this case you don't need the Remove SIM-lock patch generator, because it is for unlocking (remove service provider lock) your phone.

You just need to debrand your phone with XS++, for this you need the following files:
MAIN: a generic MAIN firmware(e.g. W580_R8BE001_MAIN_GENERIC_LA_RED52).

FS: I suppose you need the English language only. In this case you can use ANY EUROPE_x or AMERICA_x FS(e.g. W580_R8BE001_FS_EUROPE_1_RED52 ). The only difference between FS files is the language support.

Custom pack: and you need a matching custom pack. XS++ has many incorporated custom packs (e.g.HB1-06_Gen_CDA102568_10_R8A_GENERIC_EUROPE_1). In XS++ you can select from custom pack dropdown list the EUROPE_1 CDA102568/10(or something like this).