How do I disable messages shown at the top of some plugins-without direclty modifying the plugin its

Hi

I have some plugins that I want to use– however they show these large promotional messages- I want to use the plugins as they are(without changing the plugins)– however I also dont want the promotional message(shown at the top) from being shown.

Is it possible for me to create a plugin that basically removes such promotional ‘blurbs’? And leaves the rest of the plugin(ie its functionality) intact?

Thanks,

Arvind.