[bathushan]

You are allowed to,

Also read the rules, here I copy some lines witch can help you,

No Advertising - Do not advertise servers in your posts, you are free to do so in your signature though


Signature & Avatar Rules:
Height - Signatures can be a maximum of 250px high.
File Size - Images in your signature and avatar can't exceed 250KB in total size.



Full rules list here

http://forum.sa-mp.com/announcement.php?f=13