.mwp => TOPO!                 TOPO! Import - Tested on version 4.2.3

Pull up the Import Wizard (Ctrl+I)
1) Click on header topic "Handhelds" (aka GPS Unit or external file related)
2) Click on Import (from GPS or .txt) Wizard...

Window titled Step 1 (select the following option)
In a text file that lists waypoints, routes, and/or tracks

Click next

Import - Choose a GPS Text File:
1) Change "Files of type:" to "All Files(*.*)"
2) Now navigate to your folder and select the .mwp file downloaded from HAZ

Double click the file or click Open

Window titled Step 2
Comma should have selected automatically
You should see (readable) data in 
Line | Column 1 | Column 2 | Column 3

Click Next

Window titled Step 3
1 should be Routes
2 should be NAD83 or WGS84
3 leave unchecked

Click Next

Window titled Step 4
do nothing

Click Next

Window titled Final Steps (this is the important part!)
1 leave marked YES

You should see 3 colums of data
Line # | LON | LAT

Line#'s should be labeled "ignore"
if not then click the label and select "ignore"

The second column should be LON (similar to -110.32332 format)
THIS MUST BE "Lon Degrees" however there are two that read "Lon Degrees"
click the label and select "Longitude" and be sure DDD.ddd

do the same for the third column except here it will be "Latitude" DD.ddd

Click Finish

A window with the waypoints should now be displayed and you can zoom in on the map to view them also