Haha. Please read the original post guys:
"... without a null cable and without owning CrossDos or something like that on your Amiga? ..."
Hmmm. Unless you want to do some programming yourself I think you're stuck unless you can get hold of a floppy disk with PC floppy reading software. You could try scouring the newpaper classifieds for Amiga sales and ask the seller if they have such software, but personally I think you'd be better off buying a null-modem cable which is probably called something else these days:
"Null modem cable"?
"Laplink cable"?
"Microsoft Windows'95 compatible plug and play serial transfer link system adapter (TM)" - minimum spec: Pentium 2 or better CPU, 64 meg RAM and at least 300 meg hard drive space available. recommended spec: Pentium 4 1 ghz, 256 meg ram 10 Gig hard drive.