Hey there, i have seen on forum too many windows xp users are having troubles when they click at Start and launcher crash. same with me before, but i find a solution and thats worked for me.
I'm not really sure if that work to you, but try.
1. Delete IMRP_Launcher from your dekstop or anywhere you have extract it.
2. Delete the IMRP.rar, that you downloaded at sa-mp.im.
3. Click at Start > Run > and in the box it showed type: %appdata% > Hit enter > find .im-rp folder and delete it.
4. Open Control Panel > Add or Remove Programs > Scroll down and click at Microsoft Visual C++ 2013 Redistributable > now Uninstall or Remove it, whatever its called.
5. click in this link
http://sa-mp.im/download/IMRP.rar and wait till IMRP.rar downloaded.
6. Extract the imrp.exe in your dekstop
7. Double click at IMRP [launcher] and wait till Microsoft Visual C++ 2013 Redistributable installed.
8. Have fun. I hope it worked for you