You can use the windows scheduler and sqlcmd to do scheduled backups. It's not as easy as SQLAgent, but it does work. For sqlcmd, you'll want to use the -i switch to specify an input file. That query file would then contain all the backup scripts.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability