I can't sent and receive sms because I deleted message stock application

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http://forum.xda-developers.com – Hello, I just realized that I can't send sms. I can receive sms, but the received sms aren't saved in my phone. The reason is that yesterday I deleted two stock applications: the sms stock application and another stock application for generally messages (I don't know what exactly was). I deleted these applications because I installed handcent sms and I didn't like to have two applications for sms. I deleted them using the AntTek application manager. My European version Atrix has the stock ROM Andoid 2.3.4 4.5.2A-74_OLE-31. How can I solve this problem. Can I somewhere found the . (HowTos)