Help with os.spawnv

[IamIan]

I've had to migrate back to Python 2.1 and am now trying to use
os.spawnv to get around a memory leak (either in Python or ArcGIS or
both) in a geoprocessing script.

This script (Second Script) gets each Ascii file in the workspace,
converts it to a raster, sets the spatial reference, and hillshades it.
The script works on its own. In the Main Script I can successfully pass
parameters in a list, but no geoprocessing is ever initiated when using
os.spawnv. No errors are being thrown so I don't have a traceback to
post. Help getting this straightened out would be EXTREMELY
appreciated!
Main Script

# Import subprocess module
import os, sys

# Define arguments for subprocess
pyPath = "E:\\Python242\ \python.exe"
pyScript = "E:\\Docume nts and
Settings\\Admin istrator\\Deskt op\\Ian\\GIS\\P ython\\subProce ss2.py"
workspace = "E:\\GISTes t"

# Get a list of ASCII files in the workspace for ASCII To Raster
conversion
filenames = os.listdir(work space)
filenames = [filename.lower( )
for filename in filenames
if (filename[-4:].lower() == ".asc" and filename[0] != "-" )]
for filename in filenames:
# Define Img filename, truncating .asc from inAscii filename
inAscii = workspace + "\\" + filename
outImg = workspace + "\\" + filename[:-4] + ".img"

# Create parameter list
parameterList = []
# First parameter is the name of the Python executable
parameterList.a ppend('python.e xe')
# Second parameter is the full path of the Python script
parameterList.a ppend(pyScript)
# The following parameters are the arguments for the Batch script
parameterList.a ppend(filename)
parameterList.a ppend(inAscii)
parameterList.a ppend(outImg)
parameterList.a ppend(outHill)
print parameterList
# Run subprocess
os.spawnv(os.P_ WAIT, pyPath, parameterList)
print parameterList

Second Script

I can't post this verbatim for work reasons, but basically it goes:

import sys, os, win32com.client , string
gp = win32com.client .Dispatch("esri Geoprocessing.G pDispatch.1")
gp.SetProduct(" ArcInfo")
gp.CheckOutExte nsion("Spatial" )

# For each ASCII file, convert into IMG format
filename = sys.argv[1]
inAscii = sys.argv[2]
outImg = sys.argv[3]
outHill = sys.argv[4]

Do Ascii to raster conversion using inAscii, creating outImg

Set spatial reference

Hillshade using outImg, creating outHill

Convert each hillshade to IMG format, using outHill