How to append local variable to global variable in ssis?

Hi,

I have created global connection manager for my Packages and I have variable call filePath , file is on netwrok drive.

for example T:\\testConn\\testProject\\*.txt  is my full file path.

file path (T:\\testConn\\testProject\\) var is created under project.params

and file name is local variable.

How should I append both this values in all my packages(they are all independent packages) in SSIS?

Thank you.

chipsy