Options for having cFP write and read file

I have a cFP VI that runs on a cFP 2110 controller for doing process automation on a custom piece of equipment.  It seems that each month we use the same equipment for a slightly different automated process routine.  What I have done in the past is to make a copy of my VI's and real-time project and then make the changes in the code for the new process.  Most of the changes to the code between processes are just changes to numeric controllers to change ramp and slope times or the number of times the code repeats a set of steps.  I have been playing around with writing a sort of configurations page to my VI to allow the user to change some numeric controls, save them to a file using the Read Key.VI and Write Key.VI.  In the simple tests I have done, this works If I have a target VI on the cFP 2110 and a host VI where I can have the configurations page and save the file to my computer's hard drive. 
The configurations file I would create would probably have 15-30 numeric controls and maybe some string commands.  I have a couple of questions about doing this.  Do I need to go back and create both Target and Host VI and communicate between the two using shared variables, or can I just keep my current VI and write a subVI that would save my files to the cFP controller?  If I save the files to the cFP controller, can user set the numeric controller and save the file and/or  likewise call-up any of say one of say 10 differnet files to populate the various sub-VI and run? 
Finally, provided that I can write and read these small configuration numeric controller files to the controller, is there any advantage to writing the files to one method or the other: writing to the controller vs, creating a target and host VI to load the data?
Thank you for the help. 
Danny
Attachments:
Test read write key.vi ‏58 KB

StepanieO,
I finally had a change to play around with the cFP file write and read again.  I was able to write a the cFP and read the file back using write to spreadsheet and read from spreadsheet.  The one problem I can't seem to figure out is how you browse the cFP to select a file.  If I enter the file name and path into the string command it works.  But If I try to browse the cFP, the browse button only shows the computer hard drives.  Is there a way to browse the cFP controller for a specific file?
Thank you for the help.
Danny
Danny
Attachments:
Write to spreadsheet.vi ‏18 KB

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