After a quick check and assistance (host) the upload capability is now changeable.

phpinfp.php will provide the actual maximum available.

Altering the upload involves changing the upload.tpl file look for the script:
FROM:
100mb limit is:

<table width="100%" cellpadding="5" cellspacing="0" border="0">
<tr valign="top">
<td width="200" align="right"><span class="label">File:</span></td>
<td><div class="formHighlight"><input type="hidden" name="MAX_FILE_SIZE" value="1048576000">

TO:
200mb limit is:

<table width="100%" cellpadding="5" cellspacing="0" border="0">
<tr valign="top">
<td width="200" align="right"><span class="label">File:</span></td>
<td><div class="formHighlight"><input type="hidden" name="MAX_FILE_SIZE" value="2097152000">

The value is calculated by xxxmb x 1024 x 1024 = bytes value

I now have sufficient for my HD members.

Dafydd