Much of it will depend on circumstances, there's some advice here:
"Support Recommended Reading List for Deployment Solution 7.5"
http://www.symantec.com/docs/HOWTO92284
"Getting the most from DeployAnywhere for all builds of Deployment Solution (DS 6.9 and 7.x) - Contains new build of DeployAnywhere executable"
http://www.symantec.com/docs/TECH186664
"DS7.5: The new Driver Injection process for HII (including DeployAnywhere (DA))"
http://www.symantec.com/docs/HOWTO95223