edit: nevermind, it had typos and got me confused, i guess i should be asleep

use Win32::TieRegistry (Delimiter => '/');
my $version=2000;
{
my $mykey0 = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/ActiveState/Acti
+vePerl/$version"};
print 'MK0:'.$mykey0."\n"; 
}
{
my $mykey2 = $Registry->{"HKEY_LOCAL_MACHINE/Software/ActiveState/Acti
+vePerl/$version"};
print 'MK2:'.$mykey2."\n"; 
}

{
my $mykey = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/ActiveState/Activ
+ePerl/$version/"};
print 'MK1:'.$mykey."\n"; 
my $mykeyval = $mykey->{'Help//'};
print 'MV1:'.$mykeyval."\n"; 
}

{
my $part='TroubleShooters'; 
my $mykey = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/DeviceM
+anager/$part/"};
print 'ms1:'.$mykey."\n"; 
my $mykeyval = $mykey->{'/TroubleShooter-3'};
print 'ms2:'.$mykeyval."\n"; 
}

__END__ 
my $version='2.1';

my $mykey = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/SPS/$version/"};
my $mykeyval = $mykey->{'/AppsDir'};
$mykeyval2="$mykeyval"."\\start.exe";

system("$mykeyval2");
[download]

This works just fine, no caps, no slash needed at end, does need double quotes.

---

this is original with typos

use Win32::TieRegistry (Delimiter => '/');
my $version=2000;
{
my $mykey0 = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/ActiveState/Acti
+vePerl/$version"};
print 'MK0:'.$mykey."\n"; 
}
{
my $mykey2 = $Registry->{"HKEY_LOCAL_MACHINE/Software/ActiveState/Acti
+vePerl/$version"};
print 'MK2:'.$mykey."\n"; 
}

{
my $mykey = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/ActiveState/Activ
+ePerl/$version/"};
print 'MK1:'.$mykey."\n"; 
my $mykeyval = $mykey->{'Help//'};
print 'MV1:'.$mykeyval."\n"; 
}

{
my $part='TroubleShooters'; 
my $mykey = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/DeviceM
+anager/$part/"};
print 'ms1:'.$mykey."\n"; 
my $mykeyval = $mykey->{'/TroubleShooter-3'};
print 'ms2:'.$mykeyval."\n"; 
}

__END__ 
my $version='2.1';

my $mykey = $Registry->{"HKEY_LOCAL_MACHINE/SOFTWARE/SPS/$version/"};
my $mykeyval = $mykey->{'/AppsDir'};
$mykeyval2="$mykeyval"."\\start.exe";

system("$mykeyval2");
[download]

Result

MK0:
MK2:
MK1:Win32::TieRegistry=HASH(0xb6e354)
MV1:C:\Perl\html\index.html
ms1:Win32::TieRegistry=HASH(0xa3ec64)
ms2:hcp://help/tshoot/Err_Hardw_Error3.htm
[download]

First you need the double quotes,
Second SOFTWARE is all caps,
Third "subkey-name" has to end in a slash (delimiter).

http://search.cpan.org/~adamk/Win32-TieRegistry-0.26/lib/Win32/TieRegistry.pm
"Hash key string ends with a delimiter
If the key string ends with a delimiter, then it is treated as a subkey name or path of subkey names separated by delimiters."

what i think should work for you is below the __END__, i cant test it 'cuz i dont have SPS

---

---

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