No it's not possible in TGF, but it is possible in Multimedia Fusion, so the only way to overcome would be to upgrade to MMF, and you'd probably find that would solve a lot of your other problems.
Delete the other instance of this topic by the way, there's no need to post twice.
Yeah I done that before. No worries. But back to your question, the only way to change the maximum objects is definately upgrading to MMF. But it's worth it, MMF is much more stable and much more powerful. You can set the max. objects to rediculous amounts in MMF.
Yeah that'd always work. Or if you have something like particle effects or something where there is an object that doesn't really effect the gameplay, you could have a condition testing how many of this specific object there are, and if it goes above a certain number, have it pick one at random and delete it.