call a powershell script from vbscript

Ok  I am new to Powershell and I am wondering if there is any way to call a powershell from a HTA without giving the path to the powershell script, just by giving the name of the powershell. both files are on the same folder. i know that from vbscript to vbscript you can just type the name of the script and as long as they are on the same folder it understand that the vbscript is in the same folder. please help