Bought this phone, Orange PAYG and its 'branded' (think thats the word) by orange, and i cant get to all my menus, is there any way to get to them?

Have you got your SIM updates yet?

go to www.esato.com/board to find out how to debrand and unlock the phone.

if your phone gets damage or whaterver than de-branding a phone will invalidate any policy you have with the network...and Orange also know if you have done such a thing

yea if anything goes wrong no problem, do it again, you can mess the phone up like that, you just need to make sure you got a fully charged battery and the right files and thats it.