Hello.
A new interactive dissasembler was just released which runs in Windows and needs .net 3.5 runtime (vista and win7 users should be ok, XP users need to download it from M$ site). It was meant to be close to Omikron with more features and options. It can process .PRG and .VSF (vice snapshot) files and outputs in 64tass format (.TAS). Stuff should be directly compilable with 64tass - even with illegal opcodes (use -i parameter). It was extensively tested by the N0S team. More in the documentation file inside the zip :
http://csdb.dk/release/?id=100585
Hope it will come in handy for someone.
TC