```python
import os
import tempfile
import shutil
from pyaedt import Edb
from pyaedt import Hfss3dLayout
from pyaedt import Q3d

# Setup project files and paths
temp_dir = tempfile.mkdtemp()
project_file_url = "http://example.com/your_project.aedt"
project_file_path = os.path.join(temp_dir, "your_project.aedt")

# Download project file
import urllib.request
urllib.request.urlretrieve(project_file_url, project_file_path)

# Open EDB project
edb = Edb(edbpath=project_file_path, edbversion="2021.2")

# Create cutout on selected nets
cutout = edb.core_primitives.create_cutout(["GND", "VCC"])

# Export to Q3D
edb.export_to_q3d()

# Identify pin locations on components
pin_locations = edb.core_components.get_pin_locations()

# Append Z elevation to pin locations
for pin in pin_locations:
    pin_locations[pin] += (0, 0, 0.1)  # Example elevation

# Save and close EDB
edb.save_edb()
edb.close_edb()

# Open in Hfss 3D Layout and generate 3D model
hfss_3d_layout = Hfss3dLayout(projectname=project_file_path)
hfss_3d_layout.create_3dlayout_from_edb()

# Export layout to Q3D
hfss_3d_layout.export_to_q3d()

# Launch newly created Q3D project
q3d = Q3d(projectname=project_file_path.replace(".aedt", "_q3d.aedt"))

# Plot the project
q3d.plot(show=False)

# Assign sources and sinks on nets
for net, location in pin_locations.items():
    q3d.assign_source_to_net(net_name=net, net_point=location)
    q3d.assign_sink_to_net(net_name=net, net_point=location)

# Create setup and frequency sweep
setup = q3d.create_setup()
setup.props["Frequency"] = "2GHz"
q3d.create_linear_count_sweep(setupname=setup.name, unit="GHz", freqstart=0, freqstop=2, num_of_freq_points=101)

# Analyze the project
q3d.analyze_all()

# Compute ACL and ACR solutions
acl_solution = q3d.get_solution_data(expression="ACL")
acr_solution = q3d.get_solution_data(expression="ACR")

# Plot ACL and ACR
acl_solution.plot()
acr_solution.plot()

# Release the desktop
q3d.release_desktop()
```