Right. I've had a look at this & it should be quite straightforward. First, I assume you have the Cessna 310 (rlc310q.zip) correctly installed to FS2002 & also downloaded HPC310p.zip.
I'll show you the method I use for installing a new panel to any aircraft already installed to any M$ sim.
Start by opening the folder of the aircraft you wish to install the panel to. Rename the existing Panel folder to Panel.0
Now extract the new panel, in this case HPC310p.zip
On examining the extracted folder you should see 3 more zipfiles named gauges.zip, panel.zip & Texture.zip. First extract panel.zip. Open the extracted folder & cut/paste the folder named panel into the parent folder of the Cessna 310 - FS2002\Aircraft\RLC310Q
Extract gauges.zip - open the extracted folder until you see 26 GAU files. Click Edit/Select All on the menu bar & paste all the files into FS2002\Gauges. Do NOT overwrite files/folders if prompted.
Is this starting to make sense?
Right, now extract Texture.zip. This contains one texture named VC_PANEL.BMP. This is the new DVC texture so paste this file into the Texture folder of your Cessna 310. This time overwrite files/folders if prompted. We're almost ready to go.
As this is an FS9 panel it uses the FS9 defaullt GPS gauge. You can modify it to use the FS2002 default GPS like this:
Find Panel.cfg in the Panel folder you just installed & open it in Notepad. Scroll down until you see this entry:
[Window01]
Background_color=0,0,0
size_mm=512
window_size_ratio=1.00
position=0
visible=0
ident=GPS_PANEL
window_size= 0.280, 0.300
window_pos= 0.720, 0.380
gauge00=fs9gps!gps_500, 0,0,512,512
Change the last line to this:
gauge00=gps!gps, 0,0,512,512Exit Notepad saving changes. Now go & try the new panel in FS2002. Providing I haven't made a silly mistake & you followed my instructions it should work perfectly.
Good luck.