iPhone 4 - downgrade 6.0.1 to 4.1 with iFaith

I have a problem with my iPhone 4, and after endless searching on different forums, I haven't found the answer :( If anyone can help me, I would be really thankful...

I accidentally updated my iPhone 4 on 6.0.1, and now I can't use my Gevey Pro chip for unlock. It was on 4.1, with 2.10... baseband. I saved my SHSH with iFaith (because I couldn't save them with TinyUmbrella - it said I only have SHSH for 6.0 saved for my device when I tried).

Question is: Can I downgrade to 4.1 with custom firmware created and signed with SHSH with iFaith, in order to use my Gevey chip again and have 2.10 baseband? Or I need to wait for unlocking solution to come out (like X Sim, because factory unlock for my iPhone is too expensive - 120euro, Sweeden 3 network lock)?

Thanks so much in advance...

P.S.Sorry for my English :)

Anyone......?