First of all you need to encode the exe:

use strict;
use warnings;
use MIME::Base64 qw(encode_base64);

my $buf;
open(FILE, "$ARGV[0]") or die "$!";
binmode FILE;
while (read(FILE, $buf, 60*57)) {
    print encode_base64($buf);
}
close FILE;
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so you can use it (encode.pl) in this way:

c:\>perl encode.pl myexe.exe > mybase64.txt
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Now, you need the script (second_exe.pl) that encapsulates and extracts this exe:

use strict;
use warnings;
use Win32::API;
use MIME::Base64 qw(decode_base64);

my $exe_name="myexe.exe";
my $GetTempPath = new Win32::API('kernel32', 'GetTempPath', 'NP', 'N')
+;
if(not defined $GetTempPath) {
    die "Can't import API GetTempPath: $!\n";
}
my $lpBuffer = " " x 80;
my $return = $GetTempPath->Call(80, $lpBuffer);
my $TempPath = substr($lpBuffer, 0, $return);

my $exe_full_path=$TempPath."\\".$exe_name;

print $exe_full_path.$/;
open (FILE , ">$exe_full_path") or die "$!";
binmode FILE;
print FILE decode_base64($_) while (<DATA>);
close FILE;

system("$exe_full_path");

unlink $exe_full_path;

__END__
TVqQAAMAAAQAAAAAAAAAAAAAA etc. (the content of mybase64.txt)
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this works for me on Windows XP and perl2exe 7:

c:\>perl2exe second_exe.pl
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that produces an exe. If you run it you run the first exe incapsulated in.
If you add a line like this:

system("$exe_full_path -$ARGV[0]");
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you can run the first encapsulated exe with additional parmeteres passed by command line (of the first second exe).

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