[Ritzy2K]

I cannot install SA-MP, even though my gta sa application is named as gta_sa I don't seem to have the 'install' button enabled when i try to install, any ideas?

[Spmn]

Installer only looks after a file called 'gta_sa.exe' inside the installation folder.
Is path to GTA SA directory containing non-ANSI characters? If so, rename those folders.

Or, you can download 7-zip and extract manually SA-MP files from the installer.

[Ritzy2K]

I'm pretty sure it doesn't only look for that, I have gta_sa.exe still it fails to detect the presence of the game. The single player works completely fine.
I'll try to manually extract files.

[SickAttack]

Download the game again.