You may want to check out a smiliar thread, which would have pointed you at import_names() method mentioned amongst other things, but there are more tricks you may want to try ...

... @{[ ]}-voodoo to embed arbritrary expressions inside strings.

print REG qq[;
Last Name   : @{[  param('Last_Name')  ]}
First Name  : @{[  param('First_Name') ]}
]
[download]

... use printf() to move the param()'s outside your string.

printf REG qq[Last Name   : %s\nFirst Name  : %s\n],
  param('Last_Name'), 
  param('First_Name');

  ## ... or ...

printf REG <<__TEXT__, param('Last_Name'), param('First_Name');
Last Name   : %s
First Name  : %s
__TEXT__
[download]

... resort to the much underused (?) formats if you like to see a little more clearly what goes where.

format REG =
Last Name   : @<<<<<<<<<<<<<<<<<<<<<<<<
              param('Last_Name')
First Name  : @<<<<<<<<<<<<<<<<<<<<<<<<
              param('First_Name')
.
write REG;
[download]

The downside to these are you need to be mindful of what param() is returning as a multi-value param() could throw things out of whack if you're only expecting a single value, something import_names() neatly sidesteps by providing both scalars and arrays of the same param() to make context explicit.

    --k.