Well, i need one to recompile a level for university project; the reason of the request of edition 5 is that most of computers that project will be tested are quite old and cannot run a7\liteC engine on decent fps.
//I've tried using google but it looks like all downloads of 'A5 trial suddenly dissapeared.

Do you mean 5.2 or 5.24 (because of Software Renderer) ? if yes then :
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=230008&page=1

it asks for a userkey, and i need simply a trial edition.
there was still one avaible at downloads page like... year ago or so. but its gone now.

i searched for "a5 trial" with google and found the following result :
A5.12 trial
http://www.fileplanet.com/85718/80000/fileinfo/3D-GameStudio/A5-Trial-v5.12-%5BEnglish%5D

i hope this helps ^^

well, it's expired already, even while i've never installed a5 on this pc. So will have to buy one soon or forget. thanks for your time.
edit: nevermind, i found a old cd with A5 extra.

How urgent is this and how big is your level?

I still have A5.52 installed on my desktop pc so if it is not too urgent I could build the level for you.