Thanks for all the replies, its helped a lot! I did see that guide for noobs, just after I started this thread lol!
Right so here's were I am... I have downloaded the OFW 3.55, its the US one and I'm in the UK, does it matter?
Which one of the below should I use? Kmeaw's 3.55 CFW Patched PUP or Kmeaw's 3.55 Custom Firmware Package.. also will I need the BDEMU thing? were do I find it if I do need it? and just to be clear, I wont lose anything of the Int HDD will I?
Is that everything? please let me know if Ive overlooked anything.