There are multiple ways to add personalized labs to your LabQuest.

The easiest way is to use the LabQuest Lab Creator to create your labs. It will generate a LabQuest Library Update file by which you can then import the lab into the LabQuest embedded memory.
http://www.vernier.com/products/interfaces/labq2/curriculum/

See also:
     How can I get more Vernier lab instructions on my LabQuest?