[CentOS] create account for Backup Exec 12.5 on Linux [RHEL5 or 4] to perform backup???

We have several LINUX servers with Backup Exec 12.5 client on it.  Based on Backup administrator told us when configure backup EXEC client he need "root" password.  Also we can NOT change "root" password after configure otherwise backup will failed.

Does there has way I can create a account with special group assign to it for Backup EXEC to use?

Thanks.