good news..... particular as I can't understand a word of what is going on the polish guild I'm in at the moment.
I'd stick to 32bit as you have got 4 GB RAM. 32bit machine can address up to 4Gb RAM if you want to add more (upto 128Gb) then you will need a 64bit OS. Besides which, can your system handle a 64 bit OS not only the CPU needs to be capable but all your h/w drivers really need to be 64 bit as well.
Gauan
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Do not come to me for redemption, only retribution.