To modify your MX records with TotalChoice:

1. Log in to your cPanel account.
2. Under Mail options Select the MX Entry icon. A list of your current MX records will appear.
     If using the X2 theme click Mail then Click Modify Mail Exchanger (MX Entry).
3. Click Change an MX Entry.
4. In the Change MX for… field, enter ASPMX.L.GOOGLE.COM
    If you wish to add additional MX entries for your domain you will need to set them with a lower priority than the primary MX entry. For example, to add the entry ALT1.ASPMX.L.GOOGLE.COM just set the priority field to 1.  Please be aware that 0 is the highest priority and 10 is the lowest.
5. Click Change. 

It’s that simple and you should start receiving your mail via Google Apps in a few minutes.

Please note that the above instructions are specific to Google Apps but the basic steps are the same for any MX record modifications. You will  still need to open a support request if you wish to use any of the Google Apps features that require CNAME changes.