Customise Report Parameters in Report Manager

Is it possible to add custom controls in for parameters in report manager?

I have a parameter that requires the user to click a button and select a bunch of things in another form. How can i do this in reporting services?

I also would like to change the layout of the parameters toolbar, ie. make text boxes smaller widths, show/hide parameters based on other parameter values.

I know i could write my own web page that does this and hide the parameters toolbar when they run the report, but this would mean that we lose other functionality that report manager has, eg. scheduling.

Does anyone know if customising the report manager will become available in a later version?

You're correct that you can't customize Report Manager like this in RS 2005. You're also correct that if you wrote your own app using the Reporting controls in VS 2005, you'd have a lot of flexibility.

As for whether you'll be able to do this customization of RM in a later version, I doubt it, but there is "talk" of shipping add'l VS Reporting controls for things like scheduling and security, so you could build your own RM implementation.