Some time ago, I pointed out an emulation of cron running in Perl. If you can run perl-programs under your account (which I assume you can), you might give this a go. You can find it under www.megadodo.demon.co.uk/perl/. The comments in the code say it's for NT, but I assume it shouldn't be difficult - if anything has to be changed at all - to get it to run on linux.
Hope that helps,
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